✦ LIBER ✦

Conformational analysis of somatostatin and selected analogs in oriented polyoxyethylene by infrared dichroism

✍ Scribed by C. Gilon; D. Simmons; M. Goodman; J. Rivier

Publisher: Wiley (John Wiley & Sons)
Year: 1980
Tongue: English
Weight: 649 KB
Volume: 19
Category: Article
ISSN: 0006-3525
DOI: 10.1002/bip.1980.360190211

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Infrared dichroic studies and deuterium exchange measurements of somatostatin and some of its analogs incorporated in uniaxially oriented polyoxyethylene are described. Band positions and dichroic ratios in the N‐H stretching and amide I and II regions are similar to those of flexible and nonordered peptides like valinomycin and poly[Glu(ONa)]. This information, together with fast deuterium exchange rates, suggests that somatostatin exists in a flexible nonordered conformation in polyoxyethylene. One analog, di‐S^3,14^‐acetamidomethyl dihydrosomatostatin, was found to exist in both nonordered and β‐like conformations.

📜 SIMILAR VOLUMES

Conformational analysis of phosphatidyle

Conformational analysis of phosphatidylethanolamine in multilayers by infrared dichroism

✍ Hideo Akutsu; Yoshimasa Kyogoku; Hiroo Nakahara; Kiyoshige Fukuda 📂 Article 📅 1975 🏛 Elsevier Science 🌐 English ⚖ 840 KB

Built-up films of L-a-dipalmitoyl phosphatidylethanolamine were prepared. Infrared dichroism was measured for the sample and analysed by a new method. This method has been developed for the determination of the directions of transition moments in a film sample, in which there is an axis of symmetry

Evaluation of orientation in vinyl alcoh

Evaluation of orientation in vinyl alcohol-ethylene copolymer films by means of infrared dichroism and birefringence

✍ María L. Cerrada; José M. Pereña 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 171 KB 👁 2 views

Coupled measurements of birefringence and IR dichroism of drawn films of vinyl alcohol-ethylene copolymers have led to a value of around 46Њ for the angle a between the dipole moment vector of the IR band at 610 cm 01 and the chain axis. The increase of the second moment of the orientation function

ChemInform Abstract: Conformational Anal

ChemInform Abstract: Conformational Analysis in Solution of C2-Symmetric 1,1′-Binaphthyl Derivatives by Circular Dichroism Spectroscopy and Cholesteric Induction in Nematic Mesophases.

✍ Gloria Proni; Gian Piero Spada; Philipp Lustenberger; Roger Welti; Francois Died 📂 Article 📅 2000 🏛 John Wiley and Sons ⚖ 28 KB 👁 2 views

A conformational analysis of mono and di

A conformational analysis of mono and dialkyl ethers of 2,2′-dihydroxy-1,1′-binaphthalene by circular dichroism spectroscopy and cholesteric induction in nematic liquid crystals

✍ Carlo Rosini; Ivana Rosati; Gian Piero Spada 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English ⚖ 503 KB